On the Origin of Mass--Metallicity Relations, Blue Tilts, and Scaling Relations for Metal-poor Globular Cluster Systems
| dc.creator | Bekki, K. | |
| dc.creator | Yahagi, H. | |
| dc.creator | Forbes, D. A. | |
| dc.date | 2007-02-03 | |
| dc.date.accessioned | 2026-07-07T10:21:43Z | |
| dc.date.available | 2026-07-07T10:21:43Z | |
| dc.description | We investigate formation processes and physical properties of globular cluster systems (GCSs) in galaxies based on high-resolution cosmological simulations with globular clusters. We focus on metal-poor clusters (MPCs) and correlations with their host galaxies by assuming that MPC formation is truncated at a high redshift (z_trun > 6). We find that the correlation between mean metallicities (Z_gc) of MPCs and their host galaxy luminosities (L) flattens from z=z_trun to z=0. We also find that the observed relation (Z_gc ~ L^0.15) in MPCs can be reproduced well in the models with Z_gc ~ L^0.5 at z=z_trun when z_trun ~ 10, if mass-to-light-ratios are assumed to be constant at z=z_trun. However, better agreement with the observed relation is found for models with different mass-to-light-ratios between z=z_trun and z=0. It is also found that the observed color-magnitude relation of luminous MPCs (i.e., ``blue tilts'') may only have a small contribution from the stripped stellar nuclei of dwarf galaxies, which have nuclei masses that correlate with their total mass at z=z_trun. The simulated blue tilts are found to be seen more clearly in more massive galaxies, which reflects the fact that more massive galaxies at z=0 are formed from a larger number of dwarfs with stellar nuclei formed at z>z_trun. The half-number radii (R_e) of GCSs, velocity dispersions of GCSs (sigma), and their host galaxy masses (M_h) are found to be correlated with one another such that R_e ~ M_h^{0.57} and sigma ~ M_h^{0.32}. | |
| dc.description | 15 pages, 20 figures, accepted by MNRAS | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0702088 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0702088 | |
| dc.identifier | Mon.Not.Roy.Astron.Soc.377:215-228,2007 | |
| dc.identifier | doi:10.1111/j.1365-2966.2007.11588.x | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/175266 | |
| dc.subject | Astrophysics | |
| dc.title | On the Origin of Mass--Metallicity Relations, Blue Tilts, and Scaling Relations for Metal-poor Globular Cluster Systems | |
| dc.type | text |